diff options
| author | Alexander Dahl <ada@thorsis.com> | 2023-09-22 11:08:56 +0200 |
|---|---|---|
| committer | Eugen Hristev <eugen.hristev@collabora.com> | 2023-09-27 12:43:05 +0300 |
| commit | d6b4359e50bb1dc567f6596c67b25a3c7a8ff130 (patch) | |
| tree | 8a1ee472774be2b58644ad7c8aa3baa5cc703b0a /drivers/mtd/nand/raw/atmel/nand-controller.c | |
| parent | 15155ab0a3d1f839509bcac620bfb38f950bead6 (diff) | |
mtd: nand: raw: atmel: Add error handling when rb-gpios missing
Adapt behaviour to Linux kernel driver.
The return value of gpio_request_by_name_nodev() was not checked before,
and thus in case 'rb-gpios' was missing in DT, rb.type was set to
ATMEL_NAND_GPIO_RB nevertheless, leading to output like this for
example (on sam9x60-curiosity with the line removed from dts):
NAND: Could not find valid ONFI parameter page; aborting
device found, Manufacturer ID: 0xc2, Chip ID: 0xdc
Macronix NAND 512MiB 3,3V 8-bit
512 MiB, SLC, erase size: 256 KiB, page size: 4096, OOB size: 64
atmel-nand-controller nand-controller: NAND scan failed: -22
Failed to probe nand driver (err = -22)
Failed to initialize NAND controller. (error -22)
0 MiB
Note: not having that gpio assigned in dts is possible, the driver does
not override nand_chip->dev_ready() then and a generic solution is used.
Fixes: 6a8dfd57220d ("nand: atmel: Add DM based NAND driver")
Signed-off-by: Alexander Dahl <ada@thorsis.com>
Reviewed-by: Eugen Hristev <eugen.hristev@collabora.com>
Acked-by: Michael Trimarchi <michael@amarulasolutions.com>
Diffstat (limited to 'drivers/mtd/nand/raw/atmel/nand-controller.c')
| -rw-r--r-- | drivers/mtd/nand/raw/atmel/nand-controller.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c index 9873d11254..950e626f91 100644 --- a/drivers/mtd/nand/raw/atmel/nand-controller.c +++ b/drivers/mtd/nand/raw/atmel/nand-controller.c @@ -1601,10 +1601,13 @@ static struct atmel_nand *atmel_nand_create(struct atmel_nand_controller *nc, nand->cs[i].rb.type = ATMEL_NAND_NATIVE_RB; nand->cs[i].rb.id = val; } else { - gpio_request_by_name_nodev(np, "rb-gpios", 0, - &nand->cs[i].rb.gpio, - GPIOD_IS_IN); - nand->cs[i].rb.type = ATMEL_NAND_GPIO_RB; + ret = gpio_request_by_name_nodev(np, "rb-gpios", 0, + &nand->cs[i].rb.gpio, + GPIOD_IS_IN); + if (ret && ret != -ENOENT) + dev_err(nc->dev, "Failed to get R/B gpio (err = %d)\n", ret); + if (!ret) + nand->cs[i].rb.type = ATMEL_NAND_GPIO_RB; } gpio_request_by_name_nodev(np, "cs-gpios", 0, |